x raised to any odd integer

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x raised to any odd integer

by sanju09 » Sat Apr 04, 2009 6:06 am
x is an integer and x raised to any odd integer is greater than zero; is w - z greater than 5 times the quantity 7^(x-1) - 5^x?

(1) z < 25 and w = 7^x

(2) x = 4
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Source: — Data Sufficiency |